<?php
// (c) Copyright 2002-2013 by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id: quantifylib.php 44443 2013-01-05 20:30:09Z changi67 $

require_once 'lib/diff.php';

class QuantifyLib extends TikiLib
{

	function recordChangeSize( $pageId, $version, $oldData, $newData )
	{
		global $prefs;

		if ( $prefs['quantify_changes'] != 'y' || $prefs['feature_multilingual'] != 'y' )
			return;

		list($added, $removed, $complete) = $this->calculateChangeSize($oldData, $newData);

		$this->query(
			'INSERT INTO tiki_pages_changes' .
			' (page_id, version, segments_added, segments_removed, segments_total)' .
			' VALUES(?,?,?,?,?)' .
			' ON DUPLICATE KEY update segments_added = ?, segments_removed = ?, segments_total = ?',
			array( $pageId, $version, $added, $removed, $complete, $added, $removed, $complete )
		);
	}

	function calculateChangeSize( $oldData, $newData )
	{
		$oldData = $this->segmentData($oldData);
		$newData = $this->segmentData($newData);

		$engine = new _WikiDiffEngine($oldData, $newData);

		$added = 0;
		$removed = 0;

		foreach ( $engine->edits as $key => $modif ) {
			if ( is_array($modif) )
				$added += count($modif);
			elseif ( is_int($modif) && $modif < 0 )
				$removed -= $modif;
		}

		return array( $added, $removed, count($newData) );
	}

	function segmentData( $data )
	{
		$data = preg_replace('/\.\s/', "\n", $data);
		$segments = explode("\n", $data);
		$segments = array_map('trim', $segments);

		$final = array();
		foreach ( $segments as $seg )
			if ( ! empty( $seg ) )
				$final[] = $seg;

		return $final;
	}

	function getCompleteness( $pageId )
	{
		$value = $this->getOne(
			"SELECT" .
			"	tpc.segments_total / ( tpc.segments_total + IFNULL(SUM(valid.segments_added), 0) + IFNULL(SUM(valid.segments_removed),0)/10 )" .
			" FROM" .
			" tiki_pages tp" .
			" INNER JOIN tiki_pages_changes tpc ON tp.page_id = tpc.page_id AND tp.version = tpc.version" .
			" INNER JOIN tiki_translated_objects a ON a.objId = tpc.page_id AND a.type = 'wiki page'" .
			" INNER JOIN tiki_translated_objects b ON b.traId = a.traId AND b.type = 'wiki page' AND b.objId <> a.objId" .
			" LEFT JOIN (" .
			" SELECT DISTINCT" .
			" b1.page_id, b1.version, segments_added, segments_removed" .
			" FROM" .
			" tiki_pages_changes tpc2" .
			" INNER JOIN tiki_pages_translation_bits b1 ON tpc2.page_id = b1.page_id AND tpc2.version = b1.version" .
			" LEFT JOIN tiki_pages_translation_bits b2 ON b1.translation_bit_id = IFNULL(b2.original_translation_bit, b2.translation_bit_id) AND b2.page_id = ?" .
			" WHERE" .
			" b1.original_translation_bit IS NULL" .
			" AND b2.translation_bit_id IS NULL" .
			" ) valid ON b.objId = valid.page_id" .
			" WHERE" .
			" tpc.page_id = ?" .
			" GROUP BY tpc.page_id, tpc.segments_total, tpc.version",
			array( $pageId, $pageId )
		);

		return floor($value * 100);
	}

	function wiki_update($arguments)
	{
		$tikilib = TikiLib::lib('tiki');
		$this->recordChangeSize($arguments['page_id'], $arguments['version'], $arguments['old_data'], $arguments['data']);
	}
}
$quantifylib = new QuantifyLib;

